Battery booster



FIG. 1 is a perspective view from the front-top-right side of the battery booster showing the first embodiment of our new design;

FIG. 2 is a front view of the design shown in FIG. 1;

FIG. 3 is a rear view of the design shown in FIG. 1;

FIG. 4 is a left side view of the design shown in FIG. 1;

FIG. 5 is a right side view of the design shown in FIG. 1;

FIG. 6 is a top view of the design shown in FIG. 1; and,

FIG. 7 is a bottom view of the design shown in FIG. 1.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are for illustrative purposes only; the broken lines form no part of the claimed design. 

The ornamental design for a battery booster, as shown and described. 